* Distributor Cap Order Varies: The firing order for a 350 engine can change depending on the specific year, model, and even engine modifications.
* Need Specific Information: To determine the correct distributor cap order, I would need the exact model year and engine code of your GMC truck.
How to find your specific firing order:
1. Look for the Engine Code: Locate the engine code on the engine block itself, usually near the valve cover. The code might be on a plate or cast into the block. This code will help identify the exact engine configuration.
2. Use a Repair Manual or Online Resources: Once you have the engine code, you can look up the specific firing order in a repair manual for your vehicle, or use an online resource like a Haynes manual or AllData.
3. Consult a Mechanic: If you can't find the information or are unsure, it's best to consult a qualified mechanic. They can diagnose the engine code and tell you the exact firing order.
Important Note: It is very important to have the correct firing order for your distributor cap. If it's wrong, your engine will not run properly and could cause damage.
